What Causes Episodes Of Panic Attack, Hyper Sensitivity And Nightmares While Treating PTSD?

My ,Name is Reggie I,A disable vetearn of the U.S. Marine corp.I,Have chronic ptsd and been on meds.Over the past year and months I,Been have episodes.of high axnitey hyper hyper senativity and agravation do to others people and it come on strong at night and sleep isn t to well and flashback nightmares of military when people push my buttons .I,Saw my doctor of mental health and he now giving me.Prazosin a very low does because .I,Don t have high blood pressure but on the border line if these thing keeps up will this medicine help me to keep stable without raising my blood pressure???